diff --git a/src/ExpressionParser/InfixExpressionParserInterface.php b/src/ExpressionParser/InfixExpressionParserInterface.php
index 8d0ac674c..4641ef815 100644
--- a/src/ExpressionParser/InfixExpressionParserInterface.php
+++ b/src/ExpressionParser/InfixExpressionParserInterface.php
@@ -11,12 +11,16 @@
 
 namespace Twig\ExpressionParser;
 
+use Twig\Error\SyntaxError;
 use Twig\Node\Expression\AbstractExpression;
 use Twig\Parser;
 use Twig\Token;
 
 interface InfixExpressionParserInterface extends ExpressionParserInterface
 {
+    /**
+     * @throws SyntaxError
+     */
     public function parse(Parser $parser, AbstractExpression $left, Token $token): AbstractExpression;
 
     public function getAssociativity(): InfixAssociativity;
diff --git a/src/ExpressionParser/PrefixExpressionParserInterface.php b/src/ExpressionParser/PrefixExpressionParserInterface.php
index 587997c51..8e39dad37 100644
--- a/src/ExpressionParser/PrefixExpressionParserInterface.php
+++ b/src/ExpressionParser/PrefixExpressionParserInterface.php
@@ -11,11 +11,15 @@
 
 namespace Twig\ExpressionParser;
 
+use Twig\Error\SyntaxError;
 use Twig\Node\Expression\AbstractExpression;
 use Twig\Parser;
 use Twig\Token;
 
 interface PrefixExpressionParserInterface extends ExpressionParserInterface
 {
+    /**
+     * @throws SyntaxError
+     */
     public function parse(Parser $parser, Token $token): AbstractExpression;
 }
diff --git a/src/Parser.php b/src/Parser.php
index acc1a4dc9..af54f13b2 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -76,6 +76,9 @@ class Parser
         return \sprintf('__internal_parse_%d', $this->varNameSalt++);
     }
 
+    /**
+     * @throws SyntaxError
+     */
     public function parse(TokenStream $stream, $test = null, bool $dropNeedle = false): ModuleNode
     {
         $vars = get_object_vars($this);
@@ -158,6 +161,9 @@ class Parser
         }
     }
 
+    /**
+     * @throws SyntaxError
+     */
     public function subparse($test, bool $dropNeedle = false): Node
     {
         $lineno = $this->getCurrentToken()->getLine();